Core tip



Nov. 8, 1927. 1,648,399

E. M. HILL CORE TIP Filed QQ'L 12, 1925 fire. 4

I x t l Eatented Nov. 8, 1927.

E RLQ 1a. 'fzrtn' or "v'risoonstii' RABIES, wlscnrrsrri, we ts rofobnsonrnsrnn we'rnn rownn s: rerun. ooiaranrz', or 'iir'isoonsrngnarrns,w sooiism, A sonroimrron or isconsin.

" CORE 'rIr.

Application filed October 12; 1925'. s lserial I\l'o. 6 2,096.f

- 'This: invention relates. to core for winding cores of rolls of paper,such as commonly used in newspaper printing. I

--Numerous-"eflorts have been'made to. pro tectithe ends ofthetubular'core, which is usually formed of paperrolled and pastedtogether. "hfetal tips havebeen suggested winding and unwindingoperations.

for this purpose havingthe: keyway formed therein in various manners toavoid the wearingfof the core by the engagement of the driving dogtherewith both during Ithe e cores are used repeatedly and protection ofthis sort'is essential. Protection must also be afforded against thespreading of the ends of the tubular core by the use of pry barsinsert-ed therein for moving the very heavy roll' of paper wound thereonand such pro tecting tip should be devoid of shoulders on the insidethat might be engaged by a. shaft or bar passing through the core, anddevoid of shoulders on the outside to not interfere with the paper woundon the core. In most instances the metal core tips have required thepaper core to be materially weakened by having its ends trimmed toreceive the metal tip and by reason of openings formed therein to takerivets, screws and the like.

It is an object of the present'invention to avoid the weakening of thecore in this manner by providing a substantial core tip with flaringflanges capable of being forced onto the end of the core and compressingthe core material between them to efl'ect a tight joint making otherfastening means unnecessary and sufficiently embedding the flanges-inthe core material to cause them to lie substantially flush with theinner and outer surfaces of the core.

Another object of the invention is to produce the keyway in such a coretip that will have its edges re-enforced or braced by hemming or turningthe edges of the metal at the opening without materially reducing thethickness of the metal as when the core seat is formed by indentingwithout cutting the metal.

With the above and other objects in view the invention consists in thecore tip as here- I Fig. 1 is annend viewof acoretip constructedinaccordance with this invention;

Fig. 2 1s. a sectionalv on the endof a' core tube Fig. 3 is a similar-sectionalpview on a plane at right angles to the sectionalplane of Fig.2, and

In these'draw'ings, 10 indicates the usual core tube having its endcompressed between the inner; and outer concentric annular iew thereofin plac flanges 11=and 12 or thecoretip, which are joined by the ring13. The ring and flanges are" integral, being preferably formed up from.a disk of cold rolled 'steel" in a manner that is well known in the art.

' The distance between the parallel flanges 1'1 and 512 f-OH'IBWhELfiless than the thickness of the core tube and the edgesof said flangesare formed flaring so as to compress the core. tube material betweenthem when the core tip' is forced thereon with great pressure. Thestrength of the core tube material is thus not reduced at the junctionwith the core tip and still; by reason of the flanges terminatinginiknife edges ld they torm a close oint therewith free from ob-vjectionable shoulders either on' the interior or the exterior of thecore. This method of attaching the core tip to the end of the coreavoids the necessity for rivets or screws or other attaching means thatwould weaken the joint.

The usual notch or key seat 15 is formed in the edge of the core tubeand the core tip is cutaway at the inner flange 11 and the connectingring 13 to give access thereto and to avoid the key engagement with theraw edge of the cut metal such edges 16 of the opening are turnedinwardly, as best seen in Fig. 2. The rounded edges of the key openingin the'inetal tip not only facilitate'the engagement of the key in itskey seat formed thereby, but afford a strengthening re-enor distortionas the result of pressure thereon by the driving key. Inasmuch as theopening is' cut in the metal before the edges are turned, such edges arenot drawn to materially reduce their thickness and they are consequentlystronger and better able to resist tearing and distortion by the keythan if the keyway were produced by merely indenting without cutting themetal so as to form a key pocket. 7

Thekey opening cut in the metal core tip having its edges re-enforced bybeing turned into the key seat of the core tube without Stretchingaffords a stronger and more durable key-engaging surface and insures alonger life for the core tube.

The metal core tip completely filled with the compressed core materialis not likely to be expanded and distorted by the centering conesfitting thereinand altogether the tubular core equipped with the coretips asdescribed is better adapt-ed for, long continued use without thedevelopment of defects common to other devices of this character.

i What I claim as new and desire to secure by Letters Patent is:

1. A core tube having a metal core tip, the latter being provided withconcentric inner and outer integralflanges with their edges flaring andterminating in. cylindrical surfaces and having the edge of the coretube forced therein and compressed thereby whereby the core tip ispermanently secured to thecore tube with the cylindrical surfaces of theflanges flush with the inner and outer walls of the core tube.

2. A core tube having a metal core tip, the latter being provided withconcentric inner and outer integral flanges having their edges flaringand terminatingin rigid knife edges core tube, the end of the core tubebeing compressed between the flanges.

- flush with the inner and outer surface of the 3. A metal coretip forcore tubes comhaving their edges flaring and forming rigid knife edges,the end of the core tube being compressed within the core tip with theknife edges of the flanges flush therewith, there being a key seat notchin the edge of the core tube and a corresponding opening cut in the endring and the inner flange of the metal core tip, the edges of saidopening being bent inwardly within the notch to form a key seat, suchbent edges of the opening serving to prevent splitting or distortion ofthe metal around the key seat.

In testimony whereof, I alfix my signature.

EARL M. HILL.

